Hypodermic syringe for livestock



March 4%, 1958 J. L As, SR

HYPODERMIC SYRINGE FOR LIVESTOCK Filed Aug. 7, 1953 United States PatentHYPODERMIC SYRINGE FOR LIVESTOCK John Leo Kas, Sn, Boston, Mass.

Application August 7, 1953, Serial No. 372,958

1 Claim. (Cl. 128218) This invention relates to a syringe such as iscommonly used in injecting inoculating serums into farm animals and thelike. The serum is customarily supplied in a bottle the mouth of whichis closed by a rubber diaphragm for the purpose of keeping the contentsof the bottle sterile. The operator pushes the sharp point of the needleof the syringe through the diaphragm and sucks up serum into the barrelof the syringe. The needle is then withdrawn from the bottle, and thesyringe is ready for the injection of the dose of serum into an animalAfter each such inoculation, the process described must be repeated,with the danger that repeated insertions of the needle through thediaphragm which closes the bottle may result in contamination of theserum therein.

According to the present invention, the syringe is provided with meansby which a bottle of serum can be mounted thereon to supply repeateddoses of serum for successive injections until the bottle is empty. Forthis purpose the syringe is provided with an arm projecting radiallyfrom the casing between the barrel and the needle chuck. The arm has abore communicating with the interior of the barrel and containing acheck-valve. At the extremity of the arm is a short hollow needleadapted to be thrust through the diaphragm of a bottle of serum so thatsuccessive doses of serum can be withdrawn from the bottle byreciprocation of the syringe plunger. A bracket is carried by thesyringe to embrace the bottle and support it in proper relation to thesyringe.

For a more complete understanding of the invention, reference may be hadto the following description thereof, and to the drawing, of whichFigure 1 is an elevational view 'of a syringe embodying the invention,together with a bottle mounted thereon;

Figure 2 is a fragmentary plan view of the same; and

Figure 3 is a fragmentary sectional view, on a larger scale.

A hypodermic syringe is shown on the drawing, the body of the syringecomprising the customary cylindrical barrel of glass mounted in a metalhousing 12 which preferably has lateral openings 14 through which theinterior of the barrel can be seen. Reciprocable in the barrel is thecustomary piston (not shown) attached to rod 16 carrying a transversethumb piece 18 at its outer end. The rod extends through an end wall ofthe housing and is surrounded by a spring 29 which tends to maintain thepiston in its retracted position. Secured to the housing 12 are a pairof finger loops 22 through which two fingers of the operator are passedto steady the syringe when the thumb piece 18 is pressed by the thumb toadvance the piston. A nozzle 24 is integral with the housing 12 and isan extension thereof with a bore 26 which communicates with the interiorof the barrel 1 A hollow needle 28 is detachably mounted at the end ofthe nozzle 24 and in line therewith.

According to the present invention an arm 30 projects radially outwardfrom the housing 12 at a point between "ice the barrel 10 and the nozzle24. This arm has a bore 32 which communicates with the bore 26 of thenozzle and hence with the interior of the barrel. At the end of the arm30 is detachably mounted a hollow suction needle 34 which is relativelyshort and the bore of which communicates with the bore of the arm 39.The arm also carries at its end a fine hollow needle 36 of capillarysize which is parallel to the suction needle 34 and is arranged to serveas a vent. The two needles 34 and 36 are designed and arranged topenetrate through the rubber diaphragm 38 which closes the mouth of abottle 4% of serum and is self-sealing when the needles 34 and 35 arewithdrawn. To support the bottle 40 with its mouth adjacent to the endof the arm 30, a bracket 42 is mounted on the housing 12 to projectradially therefrom or, as shown, may be mounted on one of the fingerloops 22 which are fixed on the housing. The bracket may be made withtwo telescopic parts which are frictionally fitted and may be providedwith arcuate spring arms 44 adapted to embrace and grip a bottle 40. Thebracket and arms are arranged to hold a bottle in the position shown,with its mouth near the end of the arm 30 so that the suction needle 34and vent 36 can extend through the diaphragm 33. The vent 36 is arrangedso that when one end is inside the bottle 46, the other end of the ventis open to the atmosphere. The vent passage is fine enough to preventleakage of serum therethrough but allows air to enter to replace serumwhich is drawn out.

A spring-pressed check valve 46 is provided in the bore 32 of the arm soas to prevent outward flow through the bore toward the bottle. Anotherspring-pressed valve 48 is mounted in the nozzle bore to prevent inwardflow through the nozzle. Thus, when the piston is being retracted, thenozzle bore is sealed and serum is sucked into the barrel from thebottle 49. When the piston is thereafter advanced, the bore 32 is sealedby the valve 46 so that the serum is forced out through the needle 28.This operation can be repeated effectively until the supply of serum inthe bottom gets below the level of the tip of the needle 34. Thisresults in a marked increase in convenience and saving of time when aconsiderable number of animals are to be inoculated.

I claim:

In combination, a hypodermic syringe having a body including a barreland a nozzle in line with said barrel, a bracket projecting from a sideof said body, an arm projecting from said body parallel to said bracket,a hottle having a mouth and a rubber diaphragm closing said mouth, meanson said bracket engaging and supporting said bottle with said diaphragmadjacent to the end of said arm, said arm having a bore communicatingwith the interior of said nozzle, a check-valve in the bore of said armarranged to prevent outward flow through said bore, a check-valve insaid nozzle arranged to prevent inward flow therethrough, a hollowsuction needle mounted on said arm in communication with the borethereof, said needle extending through said diaphragm, and a capillaryneedle vent extending through said diaphragm.

References Cited in the file of this patent UNITED STATES PATENTS1,559,978 Page Nov. 3, 1925 1,993,664 Hirsch Mar. 5, 1935 2,122,722ONeill July 5, 1938 2,421,313 Beandon -1 May 27, 1947 2,449,678 StallcupSept. 1, 1948 FOREIGN PATENTS 478,939 France Oct. 25, 1915 1,010,029France Mar. 12, 1952

